tinySSB

P2P Protocols

Minimal P2P protocol for append-only logs over extremely constrained networks (LoRa, BLE) with 120-byte packet limit, GOSET feed synchronization, and mesh networking

Fully P2P Community Low capture risk

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Details

License Open source

Dev Status Released

Owner Christian Tschudin (University of Basel), with contributors Erick Lavoie, @mixmix, @nanomonkey

Country Switzerland

Start Year 2020

Stack ESP32/Kotlin/Python/Swift

Funding Community

Last Investigated Jan 15, 2026

Use Case Domains

Communication

Affordances

End-to-end encrypted Works offline / mesh

P2P Protocol Attributes

P2P Architecture Gossip-based (broadcast-only mesh network)

Overlay Network N/A (broadcast domain specific to network range)

Content Addressing Hash-based message IDs (20-byte SHA256)

Local-First Local-First (messages stored on device)

E2EE N/A (not specified in protocol)

CRDTs Lib N/A (append-only logs with signature verification)

Byzantine Fault Tolerance Signature-based integrity (ed25519)

Signature ed25519 signatures (64-byte)

Permissions N/A (protocol doesn't specify permissions)

Protocol Stack Position Application-layer (built on TCP/IP)

Asset / Value Embedding None — tinySSB is an academic research protocol for constrained (BLE/LoRa) mesh environments with no token or economic layer. Resource sharing is purely cooperative/volunteer.

Protocol Maturity / Standardization Academic / Research (university research project from University of Basel; published academic papers; builds on SSB protocol family)